CVE-2025-62982 identifies a Stored Cross-Site Scripting (XSS) vulnerability in the Sarah Giles Dynamic User Directory software, versions up to 2.3. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, allowing malicious scripts to be stored and later executed in the context of users’ browsers. This type of vulnerability enables attackers to perform actions such as session hijacking, defacement, or unauthorized actions on behalf of authenticated users. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) indicates that the attack can be launched remotely over the network with low attack complexity, requires low privileges, and user interaction is necessary. The scope is changed, meaning the vulnerability can affect resources beyond the initially vulnerable component. Confidentiality and integrity impacts are low, while availability is unaffected. No patches or known exploits are currently reported, but the vulnerability is publicly disclosed and should be addressed promptly. The Dynamic User Directory is typically used for managing user information dynamically in web environments, making it a potential target for attackers aiming to compromise user sessions or inject malicious content into trusted web applications.

For European organizations, exploitation of this Stored XSS vulnerability could lead to unauthorized access to user sessions, theft of sensitive information, and potential manipulation of user data within the affected web application. While availability is not impacted, the confidentiality and integrity of user data and interactions can be compromised, leading to reputational damage, regulatory non-compliance (e.g., GDPR breaches), and potential financial losses. Organizations in sectors such as government, finance, healthcare, and education that rely on the Dynamic User Directory for user management are particularly at risk. The need for low privileges and user interaction means that phishing or social engineering could facilitate exploitation, increasing the threat surface. The absence of known exploits in the wild currently reduces immediate risk but does not eliminate the potential for future attacks, especially as the vulnerability is publicly known.

Organizations should monitor for updates or patches from Sarah Giles and apply them promptly once available. In the interim, implement strict input validation and output encoding on all user-supplied data to prevent script injection. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts. Use HTTP-only and secure flags on cookies to mitigate session hijacking risks. Conduct regular security audits and penetration testing focusing on XSS vulnerabilities. Educate users about the risks of clicking on suspicious links or interacting with untrusted content. Consider deploying Web Application Firewalls (WAFs) with rules tailored to detect and block XSS payloads targeting the Dynamic User Directory. Finally, review and restrict user privileges to the minimum necessary to reduce the attack surface.